package com.wly.user.utils;




import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;


/*
* Redis使用FastJson序列化
*
* */

public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {
    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    private Class<T> clazz;

    static {
//        添加反序列化路径设置
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
        ParserConfig.getGlobalInstance().addAccept("com.wly.domain.LoginDetails");
    }

    public FastJsonRedisSerializer(Class<T> clazz){
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException {
        if (t == null){
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if (bytes == null || bytes.length <=0){
            return null;
        }
        String str = new String(bytes,DEFAULT_CHARSET);

        return JSON.parseObject(str,clazz);
    }

    protected JavaType getJavaType(Class<T> clazz){
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}
